Smoothing beamforming matrices across sub-carriers
US10924170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2019 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Apr 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/022
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless transmitter includes a radio interface and transmitter circuitry. The radio interface includes multiple transmit antennas. The transmitter circuitry is configured to hold multiple steering matrices specifying weights to be applied to one or more spatial streams transmitted via the multiple transmit antennas to a receiver that includes one or more receive antennas, the multiple steering matrices are specified over multiple sub-carriers, to calculate smoothed weights, by applying to the weights of the steering matrices phase-only corrections that reduce phase variations among the weights of the steering matrices over the sub-carriers, and to transmit to the receiver beam-formed transmissions of the one or more spatial streams over the sub-carriers, by applying to the spatial streams the smoothed weights in the respective sub-carriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.